My Bike's Overheating, Why? (sorry for the honda question)

truthfriend7 · 02-15-2009, 07:05 AM

Let me apologize for asking a question about a non-china bike. I just feel more comfortable asking you guys (being a former china biker myself) and the bikes is a similar design. It's a honda xl600 single cylinder, air-cooled engine with overhead valves. I recently had it bored out with a new piston and lapped the valves.

It runs and drives okay, but the spark plug looks too hot. Also I'm only getting about 20 miles-per-gallon. My understanding is that I should be getting twice that. So it must not be a fuel mixture issue because I'm burning through the gas. There's no fuel leaks I can see. I checked the timing and it's perfect. I did notice that one of the intake valves was too tight on the clearance but that's it. Do you think that's what was causing this or something else?

Thanks for your help, and don't feel like you need to waste any time looking for an answer. Just if any of you mechanics have something off the top of your head that helps I appreciate it.

02-15-2009, 07:05 AM	#1
truthfriend7 Join Date: Dec 2007 Location: Florida Posts: 92	My Bike's Overheating, Why? (sorry for the honda question) Let me apologize for asking a question about a non-china bike. I just feel more comfortable asking you guys (being a former china biker myself) and the bikes is a similar design. It's a honda xl600 single cylinder, air-cooled engine with overhead valves. I recently had it bored out with a new piston and lapped the valves. It runs and drives okay, but the spark plug looks too hot. Also I'm only getting about 20 miles-per-gallon. My understanding is that I should be getting twice that. So it must not be a fuel mixture issue because I'm burning through the gas. There's no fuel leaks I can see. I checked the timing and it's perfect. I did notice that one of the intake valves was too tight on the clearance but that's it. Do you think that's what was causing this or something else? Thanks for your help, and don't feel like you need to waste any time looking for an answer. Just if any of you mechanics have something off the top of your head that helps I appreciate it.
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